MIXED JET DESCALING DEVICE AXIALLY AND ECCENTRICALLY ARRANGED FOR INNER WALL OF PIPE

Abstract

A mixed jet descaling device axially and eccentrically arranged for the inner wall of a metal pipe comprises a support rod (1) arranged inside the metal pipe (100), the support rod being parallel to the central axis of the metal pipe, eccentrically arranged and not concentric with the central axis of the metal pipe; and at least two spray nozzle units (2, 2, 2) for spraying the mixed jet, the spray nozzle units being arranged from front to back along the length direction of the support rod. At least two mixed jet spray nozzles (21, 21, 21) are provided in each spray nozzle unit and uniformly arranged along the circumference of the support rod in such a manner that the mixed jet spray nozzles diverge towards periphery of the support rod with the axis of the support rod as the center. The mixed jet spray nozzles of the spray nozzle units arranged from front to back are staggered from front to back in the circumferential direction of the inner wall of the to-be-descaled metal pipe, thereby forming a mixed jet spray nozzle matrix and creating an effective descaling zone capable of completely covering the circumferential surface of the inner wall of the metal pipe. The descaling device can achieve continuous, high efficient, stable and environment-friendly descaling for the inner wall surfaces of cold-state metal pipes.

Claims

1. A mixed jet descaling device for an inner wall of a metal pipe, characterized by comprising: a support rod arranged inside the metal pipe; and at least two spray nozzle units for spraying a mixed jet, the spray nozzle units being arranged on the support rod along the lengthwise direction thereof in axially eccentric positions of the inner wall of the metal pipe, a mixed jet spray nozzle being provided in each spray nozzle unit and arranged on the side of the support rod having a larger spacing between the support rod and the inner wall, and the at least two mixed jet spray nozzle being arranged in a diverging manner with the axis of the support rod as the center.

2. The mixed jet descaling device for an inner wall of a metal pipe of claim 1, characterized in that the mixed jet spray nozzles of the at least two spray nozzle units form a mixed jet spray nozzle matrix, so as to provide an effective descaling zone capable of covering the circumferential surface of the inner wall of the metal pipe.

3. The mixed jet descaling device for an inner wall of a metal pipe of claim 1, characterized in that when viewed in the axial direction of the support rod, the mixed jet spray nozzles of the at least two spray nozzle units are uniformly arranged in such a manner that the mixed jet spray nozzles diverge towards the periphery of the support rod with the axis of the support rod as the center.

4. The mixed jet descaling device for an inner wall of a metal pipe of claim 1, characterized in that the support rod comprises a first support portion for arranging the spray nozzle units and a second support portion extending from the end of the first support portion by bending spatially, respectively, and axes of the first and second support portions are eccentric relative to the central axis of the metal pipe to be descaled.

5. The mixed jet descaling device for an inner wall of a metal pipe of claim 4, characterized in that the second support portion extends from the end of the first support portion by bending twice spatially, such that the first support portion is parallel to the second support portion.

6. The mixed jet descaling device for an inner wall of a metal pipe of claim 4, characterized in that the first and second support portions are parallel to the central axis of the metal pipe.

7. The mixed jet descaling device for an inner wall of a metal pipe of claim 4, characterized in that the axes of the first and second support portions are both arranged on the circumference of a concentric circle with the central axis of the metal pipe as the center, and uniformly arranged on the circumference in an angularly staggered manner.

8. The mixed jet descaling device for an inner wall of a metal pipe of claim 4, characterized in that the support rod further comprises a third support portion which is used for arranging the spray nozzle units and extends from the end of the second support portion by bending spatially, and an axis of the third support portion is eccentric relative to the central axis of the metal pipe to be descaled.

9. The mixed jet descaling device for an inner wall of a metal pipe of claim 8, characterized in that the third support portion extends from the end of the second support portion by bending twice spatially, such that the third support portion is parallel to the second support portion.

10. The mixed jet descaling device for an inner wall of a metal pipe of claim 8, characterized in that the axes of the first, second and third support portions are all arranged on the circumference of a concentric circle with the central axis of the metal pipe as the center, and uniformly arranged on the circumference in an angularly staggered manner.

11. The mixed jet descaling device for an inner wall of a metal pipe of claim 1, characterized in that an angle is formed between the axial direction of the mixed jet spray nozzle and the central axis of the support rod.

12. The mixed jet descaling device for an inner wall of a metal pipe of claim 1, characterized in that each of the spray nozzle units is provided with at least two mixed jet spray nozzles.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. 1 is a structural schematic view of a first embodiment of the present invention.

[0024] FIG. 2 is a side view of FIG. 1.

[0025] FIG. 3 is a sectional view taken through A-A of FIG. 1.

[0026] FIG. 4 is a sectional view taken through B-B of FIG. 1.

[0027] FIG. 5 is a sectional view taken through C-C of FIG. 1.

[0028] FIG. 6 is a structural schematic view of a second embodiment of the present invention.

[0029] FIG. 7 is a side view of FIG. 6.

[0030] FIG. 8 is a structural schematic view of a support rod in the second embodiment of the present invention.

[0031] FIG. 9 is a sectional view taken through D-D of FIG. 6.

[0032] FIG. 10 is a sectional view taken through E-E of FIG. 6.

[0033] FIG. 11 is a sectional view taken through F-F of FIG. 6.

PREFERRED EMBODIMENTS OF THE INVENTION

[0034] Referring to FIGS. 1-5, an axially eccentrically arranged mixed jet descaling device for an inner wall of a metal pipe of the present invention comprises a support rod 1 arranged inside the metal pipe 100 to be descaled, the support rod being parallel to the central axis of the metal pipe 100, eccentrically arranged and not concentric with the central axis of the metal pipe; and three spray nozzle units 2, 2, 2 for spraying a mixed jet, the spray nozzle units being arranged one behind another along the lengthwise direction of the support rod, wherein at least two mixed jet spray nozzles 21, 21, 21 are provided in each spray nozzle unit 2, 2, 2 and uniformly arranged along the circumference of the support rod 1 in such a manner that the mixed jet spray nozzles diverge towards the periphery of the support rod with the axis of the support rod 1 as the center; and the mixed jet spray nozzles of the spray nozzle units 2, 2, 2 arranged one behind another are staggered one behind another in the circumferential direction of the inner wall of the metal pipe to be descaled, thereby forming a mixed jet spray nozzle matrix and creating an effective descaling zone capable of covering the circumferential surface of the inner wall of the metal pipe. A larger spacing and a smaller spacing exist between the support rod 1 and the inner wall of the metal pipe 100, the greater spacing is larger than the smaller spacing, i.e., as shown in the figures, the spacing between the upper inner wall and the support rod is the larger spacing and the spacing between the lower inner wall and the support rod is the smaller spacing, the upper inner wall and the lower inner wall are divided by a horizontal line of the support rod, and the mixed jet spray nozzles 21, 21, 21 are arranged on the side of the support rod having the larger spacing between the support rod 1 and the inner wall 100.

[0035] Referring to FIGS. 6-11, which show the second embodiment of the present invention, the support rod 1 comprises a first support portion 11, a second support portion 12 which extends from the end of the first support portion 11 by bending twice spatially and is parallel to the first support portion 11, and a third support portion 13 which extends from the end of the second support portion 12 by bending twice spatially and is parallel to the second support portion 12, axes of the first to third support portions 11-13 are all arranged eccentrically with identical eccentric values, and the axes are arranged in an angularly staggered manner on a circumference with the central axis of the metal pipe 100 as the center; and the mixed jet spray nozzles in the spray nozzle units 2, 2, 2 on the first to third support portions 11-13 are arranged to be staggered one behind another in the circumferential direction of the inner wall of the metal pipe to be descaled, thereby forming a mixed jet spray nozzle matrix and creating a circular effective descaling zone capable of covering the circumferential surface of the inner wall of the metal pipe 100.

[0036] In addition, the axes of the first to third support portions 11-13 are all arranged on the circumference of a concentric circle with the central axis of the metal pipe 100 as the center, and uniformly arranged on the circumference in an angularly staggered manner.

[0037] Furthermore, an angle is formed between the axial direction of the mixed jet spray nozzle and the central axis of the support rod.

[0038] The spray nozzle units of the present invention are all fixed on an eccentric tortuous support rod, and the mixed jet spray nozzles in each spray nozzle unit are arranged in a diverging manner in accordance with the respective center, namely, the mixed jet is formed in a diverging manner; and the mixed jet spray nozzles in each spray nozzle unit are uniformly arranged in the circumferential direction of a circular cross section of the pipe in a typically eccentrically diverging form, the values of staggered angles between every two spray nozzles in the same spray nozzle unit in the circumferential direction of the cross section are the same, namely when three spray nozzle units overlap, it can be seen from the view in the overlapping direction that the values of staggered angles between every two adjacent spray nozzles in the circumferential direction of the cross section are the same after the three individual spray nozzles overlap.

[0039] In this way, when the pipe moves straight in the axial direction, and all the spray nozzle units are spraying and remain stationary, the scales of the inner wall of the pipe are completely removed after the inner wall of the pipe completely pass through all the spray nozzle units.

[0040] The present invention takes full advantage of the mixed jet descaling effect and the cross section properties of the pipe, and uses this high-pressure jet method to achieve high-speed continuous descaling for the pipe.